Tab Session Manager by sienori

Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.

• Save and restore windows and tabs
• Manage sessions with name and tags
• Auto save when window is closed
• Auto save at regular intervals
• Import and export sessions
• Compatibility with Chrome extension
• Cloud sync

Chrome version:
https://chrome.google.com/webstore/detail/tab-session-manager/iaiomicjabeggjcfkbimgmglanimpnae
Edge version:
https://microsoftedge.microsoft.com/addons/detail/jkjjclfiflhpjangefhgfjhgfbhajadk

USERS:

• Since updating to version 3.0.0, there is a problem that the session list can not be opened. Please see here for solutions. https://github.com/sienori/Tab-Session-Manager/wiki/IndexedDB-Error
• Vote on Mozilla website for APIs/bug fixes needed by session managers, so they can be better. https://github.com/sienori/Tab-Session-Manager/issues/364

Version 6.1.0

• Added option to sync (or not sync) auto save sessions

Version 6.0.0

• Added cloud sync function
  • You can save sessions to Google Drive and sync with other devices.
• Added option to add device name when saving session

Version 5.2.0

• Added function to open startup session when starting the browser
• Speed up display open / remove buttons in session list
• Fixed problem where windows without titles could not be opened individually
• Fixed problem where unable to open a tab of removed container

Version 5.1.0

• Added option to show open / delete buttons in session list
• Supported keyboard operation of session list
  • Select session with up / down key
  • Open session with shift + enter key
• Fixed issue where the height of the overflow menu was small
  • The small width is a Firefox issue
• Added option to adjust sidebar width
• Change minimum and default values of popup width option
• Faster response when a session is selected
• Fix problem where ignore URL option was not working

See more release notes
https://github.com/sienori/Tab-Session-Manager/releases

I was inspired by the following great add-ons, developed as an add-on for Firefox 57 or later.
Session Manager by Michael Kraft
http://sessionmanager.mozdev.org/index.html